共计 712 个字符,预计需要花费 2 分钟才能阅读完成。
在 Python 中,可以使用字符串的 find()
方法来查找指定字符。find()
方法返回指定字符在字符串中第一次出现的位置,如果没有找到则返回 -1。
以下是使用 find()
方法查找指定字符的示例:
string = "Hello, World!"
character = "o"
index = string.find(character)
if index != -1:
print(f"The character '{character}' was found at index {index}.")
else:
print(f"The character '{character}' was not found in the string.")
输出:
The character 'o' was found at index 4.
此外,还可以使用 index()
方法来查找指定字符。index()
方法的用法与 find()
方法类似,但是如果指定字符不存在于字符串中,index()
方法将会抛出一个 ValueError
异常。
string = "Hello, World!"
character = "o"
try:
index = string.index(character)
print(f"The character '{character}' was found at index {index}.")
except ValueError:
print(f"The character '{character}' was not found in the string.")
输出:
The character 'o' was found at index 4.
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